peaee



3 Sheets-Sheet 1.

G. R. PEARE.

(No Model.)

& oo oo 1 0 b e d e Tut w t ma P V O M L A flu I N A H O E M 0 6 7 Z 7 2 m N INVENTOR v ye ZiPewre By his flttorney N. PETERS. Pholwllmo n mr. Washington. D. c

(No Model.) 3 Sheets-Sheet 2.

G. R. PEARE.

MECHANICAL MOVEMENT. No. 272,760. Patented Feb.20, 1883.

INVENTOR G'eal ye Efeare, By /uls Jill/171111 No Model.) 3 Sheets-Sheet 3. G. R. PEARE.

MECHANICAL MOVEMENT. No. 272,760. Patented Feb.20, 1883.

WITNESSES INVENTOR G'eor e If} By his .dltorney k C! NA FETR5. Phnlo-Lnhognphcr. Wailingian. n. c.

EErcE.

UNITED STATES PATENT GEORGE R. PEARE, OF LYNN, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO JOHN H. ALLEY, OF SAME PLACE.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 272,760, dated February 20, 1883.

' Application filed January 20, 1883. (N model.)

To all whom "it may concern: I the top supporting-plate removed. Fig. 3 is Be it known that I, GEORGE R. PEARE, of an end elevation, on enlarged scale, of a por- Lynn, in the State of Massachusetts, haveintion of the pattern-drum, with one of the pat-. vented a certain new and useful Mechanical tern-pin slides in section. Fig.4.is an enlarged 5 Movement, of which the following is-a speciperspective view of one of the patternpin 5 V fieation. slides. Fig. 5 is a plan of one of the patternp The mechanism in which my invention is emregulating arms. Fig. 6 is a plan of the slot- 5 bodied is designed with special reference to ted sector-arm, showing also the object-shaft i its employment as apattern operating or regugeared thereto. Figs- 7, 8,9, and 10 are plan [0 lating mechanism, and is adapted for use with views of the pattern-regulating arms and their r a great variety ofmachines in which a pat adjuncts, representing diagrammatically the tern must be automatically followed. 1- do changes in the position of the parts during the not, however, restrict myself to its employback-and-f'orth movement'of the arms. Fig. mcntin this connectiomi'orthe shaft controlled 11 is a plan view, partly in section, of a modi- 15 by said mechanism, which I term the objectfled arrangement of mechanism, in which the shaft, may be put to any use that is desirable pattern-regulating arms, instead of vibrating, or convenient. move back and lorth in a right line. Fig. 12 I My invention is characterized by the combiis a front elevation of the cam for driving the nation, with the object-shaft or other device pattern-regulating arms, showing also the two 20 whose movements are to be controlled, ot' a arms engaged therewith. 7o pattern-drum armed peripherally with pat- I shall first describe the construction, artern-pins, and rotatable so as to bring each rangement,and mode ofoperation of the mechpin successively into the path, and between anism shown in Figs. 1 to 10, inclusive. the interior opposite faces of two pattern-regu- A vertical shaft or arbor, A, is mounted in lating arms, which move to and from one an- .proper bearingsA, secured to theplate orother other lengthwise of the drum. The sum of the proper support, A and has imparted to it a distances traveled by the two arms is always movement of continuous rotation, obtained in thesame. Thedifferences betweentheirrespectthis instance from the horizontal shaftB (which ive lengths of movement, governed by the relisdriven bysomesuitableprime mover) through 0 ative positions of the successive pattern-pins, the gearing 1, 2, 3, and 4. which serve to arrest one or the other of the Upon the arbor A is fixed an eccentric, 0, arms sooner or later in its movement, produce surrounded by a strap, a, from which projects and determine the character or extent of the the horizontal pitman b, carrying at its outer variations in the movement of the object-shaft. extremity the vertical cross pin 0, which ex- 5 The varying movements of the object shaft tends above and below the pitman. are thus dependent upon and may not improp- Upon arbor A, above the eceentric,is loosely i -erly be considered the differential of the movemounted a toothed sector or gear, I), from the ments of the two opposed reciprocating pathub of which projects an arm, I), having a tern-regulating arms. By r'eciprocationlinlongitudinal slot, (1, which is'entered by the 4o tend back-and-forth movement, whether in a upper end of the cross-pin c. The sector and right line or in an arc of a circle. its arm are capable of oscillating on the arbor The nature of my invention and the manner Aas an axis,and the sector engages the pinion in which the same is or may be carried into 6 on the objectshaft E, which represents the effect will be readily understood by reference device whose movement is to be controlled. 5 to. the accompanying drawings, in which On the arbor A, below the eccentric O, are 5 Figure 1 represents in side elevation, partly loosely moun edtwo arms, FF, capableofoscilin section, a mechanism embodying my invenlatingonarborAas an axis. Thesearms,which tion, the pattern-regulating arms in this ar- 1 have termed the pattern-regulating arms, rangement having a vibratory or oscillatory are formed and arranged and move very much 50 movement. Fig. 2 is a plan of the same with like the legs of calipers. Their shanks are I00 formed so as to permit inclined slotsff to be made in them, so placed that when the arms are put together the slots may cross one another. Thelower end of the cross-pin c enters these two slots at their point of intersection, as indicated in Figs. 2, 7, S, 9, and 10, so that the back-andforth movement of the pin, derived from the rotating eccentric C, will cause the arnis to oscillate to and from one another. Opposite to the outer ends or points of the pattern-regulating arms is a horizontal drum, Gr, heretofore termed by methe pattern-drum, supported in hearings in which it can revolve, and having an intermittent movement of rotation imparted to it from shaft B by means of a worm-cam, H, on said shaft, which engages a toothed heel, G, on the drum, and at each revolution turns the same a distance equal to one tooth. The cam-rise by which this movement is effected is indicated at 9, Fig. 1. The periphery of the drum is curved lengthwisein the arc of a circle of which the axis of oscillation of arms F F is the center, and it is also formed in itsperiphery with longitudinal undercut or dovetail grooves h. Each groove contains a dovetail slide, i, from which projects a pin,j. The pinsjare what I have hereinbefore termed pattern-pins, and they are mounted on slides. so as to permit them to be adjusted to the various positions in the grooves required for the production of any given pattern. Each slide,when adjusted, can be held in place by set or tightening screw t", Figs. 3 and 4. The pins project from the periphery of the drum, and the latter is intermittently rotated by H and G, so as to bring each pin in succession.into the path and between the outer ends or points of the oscillating pattern-regulating arms.

The opera ion of the parts will be readily understood by reference to the diagrammatic figures 7,8, 9, and 10. Suppose the eccentric to be at that extreme of its throw represented in Fig. 8, in which the cross-pin is moved forward to the front ends of the slots ff, so as to open wide the arms F F, the axis A, pin 0, and the pattern-pinjon drum G being in line. Under these conditions the eccentric, as it continues to rotate, will cause the pattern-regulating caliper-arms to close, as indicated in Fig. 7, where they are half closed, and in Fig. 9, where they are entirely closed, less the thickness ofthe pin j, which they clasp. Each feedregulating arm has moved the same distance, the points A c 9' have remained in line in the same position, and consequently the sector D has remained unmoved and at rest. If the next succeeding pattern-pin brought around by the intermittently-moving pattern-drum into the path of the arms F F stands directly in rear of the pin 7' shown in the figures under consideration, then a repetition of the operation will leave the sector D unaffected, as before. But suppose that the next succeeding pin stands obliquely in rear of the pin j, so that when brought around it will occupy the position indicated at j, Fig. 10. The effect will be to arrest the arm F before it has traveled its normal distance, and consequently the arm F will travel a correspondingly increased distance,with theresult of drawing or moving the pin 0 to a position indicated at c, Fig. 10, thus bringing the cross-pin, the pattern-pin, and the axis A in line, as they must always be at the conclusion of the closing movement of the arms F F. The effect of thus moving the pin 0 will be to correspondingly swing or turn the sector D, whose slotted arm D is engaged by the pin, and this movement of the sector through the pinion 0 will correspondingly shift the object arbor or shaft E. Thus, according to the varying position of the successive pattern pins, the object-shaft E will be shifted intermittently and at the proper times to produce any required pattern.

v The combined range of movement of the two pattern -regulating caliper-arms is equal to about twice the length of the pattern-drum, (less.of course, the thickness or diameter of the pattern-pin,) this being necessary for the reason that for some patterns some of the pattern-pins require to be set at one or the other extreme end of the pattern'drum. One revolution of the drum completes one figure or element of the pattern.

Larger or smaller drums carrying the requisite number of pattern-pins maybe employed, according to the requirements of the pattern element, and for this purpose the bearings which support the pattern drum should be made adjustable, so as to permit them to be adjusted to and from the ends of thelarms F F, according to the diameter of the particular drum that may be employed, and the drum should be so mounted as to permit it to be removed and replaced by another.

The mechanism illustrated in Figs. 11 and 12 involves the same principle and mode ot'operation as already described with reference to the preceding figures, but under a somewhat modified arrangement. The caliper-like pattern-regulating arms reciprocate in a right line, and consequently the pattern-drum (which in other respects is constructed and is also operated in substantially the same manner as the drum shown in the preceding figures) doesnot require to have its periphery curved in the direction of the length of the drum. The pattern-drum and pattern-pins are lettered as in the preceding figures.

The pattern-regulating arms are lettered I I. They are supported on a guide-rod, J, on which they are free to slide back and forth, and their outer ends encircle and are adapted to slide on a shaft, K. This shaft is a rotary power-driven shaft, which is mounted in proper bearings 70, and is arranged to have a sliding movement, for which purpose the gear on it, which meshes with the prime moving-gear, must be united to said shaft by a spline-andgroove connection, so that while imparting continuous rotary movement to said shaft it will not follow its longitudinal movement, but

ICC

will remain in gear with the prime mover. This arrangement, being one that is well known to mechanics, is not represented in the.drawings.

Upon the shaft K, between the arms I I, is fixed a scroll or curved cam, L, having a pcripheral cam-groove, l. Into this groove extends a pin or roller-stud, m, attached to the end of a branch arm, n, projecting from each pattern-regulatingarm. The two pins or studs are placed at points in the cam-groove diametrically opposite one another. The throw of the cam is equal to the length of the patterndruni less the thickness of the pattern-pin, and it consequently acts at each revolution to move each pattern-regulating arm once back and forth toward and away from one another through this distance.

In the drawings the cam is shown in central position, in which position each arm is ata point opposite the adjoining end of the drum. In the central position of the pattern-pin j (shown in the drawings) the two arms will move up to the pin without effecting any change in the position of the parts; but suppose the drum were revolved to bring the pin j between the arms. In that case the arm I would first bring up against the pin and would be arrested before traveling its normal'distance,and the result would be to draw over toward it the other arm, I, and consequently the cam L and shaft K a'corresponding distance. Thus a sliding movement would be imparted to the shaft K, which can be availed of in various ways for controlling purposes. In the arrangement shown in the drawings it is availed of by connecting the end of the shalt to a sliding rackbar, M. which engages a pinion,e, on the objectshaft E. I

it will be seen that the same result is at tained in.this case as is attained by the mechanism first above described, and that the same principle and mode of operation are involved in both cases, the only difference being in the construction and arrangement of the special instrumentalities employed.

I remark that the pattern-drum can be made longitudinally movable instead of the shaft K, in which case the rack M would be carried by the arbor of the drum, and the arbor would be connected by a spline-and-groove connection with its driving-gear, as hereinbefore provided with respect to shaft K. This obvious reversal of parts is also applicable to the arrangement represented in Figs. 1 to 10.

Other modifications might also be described, but the foregoing are sufficient to illustrate the nature of theinvention. 1 do not restrict myself to the instrumentalities hereinbefore described, for it is manifest that the same can be considerably varied without departure from my invention, the characteristic feature of which is found in the combination of the patternidrum and pins, and the reciprocating pattern-regulating arms, (whether moving in a right line or in a curved path,) connected to the object-shaft or other device to be controlled in such manner that the changes in the position ofsaid device shall be determined by and dependent upon the relative extent of movement ot'said arms, or, in other words, by the difference between the distances traveled by said arms before they respectively meet the pattern-pin at each reciprocation.

What I therefore claim as new and of my invention is- The combination of the reciprocating regulating-arms, the pattern-drum provided with projecting pattern-pins, which by the rotation of said drum are successively brought into the path of movement and between the ends or points of said arms, the object-shaft or device to be controlled, and connecting mechanism, substantially as described, whereby the shifting of said object-shaft or its equivalent is effected to an extent dependentupon and proportionate to the difference between the distances traveled by the said arms before they respectively meet the pattern-pin at each reciprocation, the combination being and acting substantially as hereinbefore set forth.

In testimony whereof I have hereunto set my hand this 17th day of January, 1883.

GEO. R. PEARE.

Witnesses:

EWELL A. DICK, J. WALTER BLANDFORD. 

